The act of vomiting into the mouth of a sexual partner, who should then be courteous enough to return the favour.

This gesture of affection can be repeated ad infinitum, but the rules are that not a single drop shall pass outside of either person's mouth.

Step 1) Eddie moves in on potential conquest. As he moves in for a 'kiss', said conquest meets his lips.

Step 2) As soon as it can be ascertained that lips are parted, the operation has the green light. Eddie triggers his gag reflex and spews a stream of bile into conquest's mouth

Step 3) In most cases, a person's natural reaction to being sick is to turn their head away and to the ground. EDDIE MUST NOT LET THIS HAPPEN. With a deft drop of the shoulder he has manouevred underneath conquest and pressed his mouth to hers once more, catching her bounty

Step 4) Eddie has two choices now: swallow or continue the mouth-rape. Eddie realises that Divine Reciprocity is a game that gets increasingly difficult to continue, so his decision is not taken lightly